Sand-molding machine.



PATENTED MAR. 28, 1905.

J. J. MOGLBLLAND.

SAND MOLDING MACHINE.

APPLIGATIOH FILED JULY 26. 1904.

Y 3 SHEETS-SHEET 1.

No. 785,908 PATENTED MAR. 28, 1905. J. J. MOOLELLAND. SAND MOLDINGMACHINE.

APPi-IUATION FILED JULY 26. 1004.

3 SHEETSSEEET 2 l/ifnesses tiller.

PATENTED MAR. 28, 1905.

J. J. MQOLELLAND. SAND MOLDING MACHINE.

APPLICATION FILED JUJY 26. 1904.

3 SHEETS-SHEET 3.

Finesse: aj. WW W UNITED STATES Patented Ma1-chf28, 1905.

PATENT OFFICE.

JOHN JAMES MoOLELLAND, OF LONDON, ENGLAND, ASSIGNOR TO THE SAFETY TREADSYNDICATE LTD., OF LONDON, ENGLAND.

SAND-MOLDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 785,908, dated March28, 1905.

Application filed July 26, 1904. Serial No. 218,266.

To all whom it may concern:

Be it-known that I, JOHN JAMES McOLnL- LAND, foreman iron-molder, asubject of the King of Great Britain, and a resident of 7 3 Harrowgateroad, South Hackney, London, England, have invented certain newanduseful Improvements in Sand-Molding Machines, of which the following isaspecification.

The present invention has reference to sandmolding machines wherein themold boxes or flasks inclosing the patterns are carried by trolleyswhich run on tracks beneath a rammer-head which is used for rammingtight the sand in the flasks.

The object of the present invention is to provide suitable andconvenient meansfor running the trolleys mechanically to and from therammer-head in such manner that they may be used alternately or thateither one may be used without the other.

In the accompanying drawings I have shown a machine embodying thepresent improvements. 7

Figure 1 is a plan View; Fig. 2, a frontelevation, and Fig. 3 an endelevation. A

a is a framing overhanging a track Z) and supporting in suitable guidesa rammer-head 0. This rammer-head is worked by a rocklever (Z, coupledby a link 6 to the piston-rod of a compressed air or other cylinder f. gg are trolleys running on the track L. So far this arrangement issimilar to that in common use; but I will now proceed to describe howthe trolleys and mold-boxes are manipulated according to my presentinvention.

Upon the framing a is an extension which supports a pair of cylinders /lh separately and independently mounted and supplied with motive fluid bymeans of the pipes 2'. piston-rod of the cylinder it engages by means ofits slotted end with a pin on the shortlimb of the cranked lever j,pivoted to the framing. The other limb of the lever j is jointed to alink A, connected to the trolley 9, so that when the lever is rocked thetrolley will move to and fro. The piston-rod of the cylinder It isconnected by asimilar lever and link k with the trolley g.

The

Z Z are hand-levers for operating the slidevalves of the cylinders it h,so that the latter may be caused by their pistons to pull the trolleysto and fro on the track at the will of the attendant toward and awayfrom the rammer-head.

m n are spring-buffers to prevent the trolleys from overrunning theirset positions.

The trolleys comprise plates 0, whereon the patterns rest, and throughthese plates pass pillars 19, upon the ends of which rest the mold boxesor flasks q. (See Figs. 2 and 3.) The pillars p are mounted upon frames7' beneath the trolleys, which frames are supported on the rods ofpistons s, working in cylinders 6.

Flexible pipes at a are provided, whereby pressure may be led to thecylinders, so as to raise the pistons, and with them the frames 9' andmold-boxes q, thereby lifting them'clear of the patterns, which are leftbehind on their plates.

In Fig. 2 I have shown in dotted lines the mold-box raised by the pistonof the trolley g. From that position it is readily lifted by hand andplaced ready for the casting.

Any convenient form of rammer may be employed.

Although the machine as illustrated shows trolleys which may be broughtalternately into position under the rammer to have the molds rammed,there being a separate means for moving each trolley, either one withits mold-box can be moved to and fro while the other remains at rest,and hence in cases wherein it may be desirable the mold-box on onetrolley alone may be used and no power need be wasted in moving theotherone to and fro.

\Vhat I claim as my invention, and desire to secure by Letters Patent,is

1. In a molding-machine comprising a rammer and trolleys for carryingmold-boxes beneath the said ra'mmer, the combination with said trolleysof motive-power cylinders and pistons working'therein, one such cylinderand piston for each trolley, and independent connections between eachpiston and its respective trolley.

2. In a sand-molding machine comprising a rammer and trolleys forcarrying mold-boxes In testimony whereof I have signed my nanie beneaththe said rammer,tl1e combination with to this specification in thepresence of two subsaid trolleys of motive-power cylinders and scribingWitnesses.

pistons, one such cylinder and piston for each JOHN JAMES MCCLELLAND. 5trolley, a lever connected With each of said \Nitnesses:

pistons and a link-rod connecting said lever ALFRED V. BISHOP,

with its respective trolley. HERBERT D. JAMEsoN.

